EP 1167289 B1 20050810 - Process for producing a purified aqueous hydrogen peroxide solution
Title (en)
Process for producing a purified aqueous hydrogen peroxide solution
Title (de)
Verfahren zur Herstellung einer gereinigten wässrigen Wasserstoffperoxidlösung
Title (fr)
Procédé de production d'une solution purifiée aqueuse de peroxyde d'hydrogène
Publication
Application
Priority
- JP 2000186900 A 20000621
- JP 2000371996 A 20001206
Abstract (en)
[origin: EP1167289A2] The present invention provides a process for producing a highly purified aqueous hydrogen peroxide solution from which silicon oxide impurities are removed to a minimum by purifying an aqueous hydrogen peroxide solution containing silicon oxide impurities. <??>The present invention comprises a process for producing a purified aqueous hydrogen peroxide solution by removing silicon oxide impurities contained in an aqueous hydrogen peroxide solution, which comprises: adding a flocculating agent to an aqueous hydrogen peroxide solution containing silicon oxide impurities, and filtering out impurities of solid content contained in the aqueous hydrogen peroxide solution with a precision filter, thereafter bringing the aqueous hydrogen peroxide solution obtained as above into contact with an anion exchange resin in a fluoride ion form by at least one fluoride compound which contains 0.05 % by weight or less of SiF6 and is selected from the group consisting of sodium fluoride, potassium fluoride and ammonium fluoride.
IPC 1-7
IPC 8 full level
B01D 61/14 (2006.01); B01D 21/01 (2006.01); B01J 39/04 (2006.01); B01J 41/04 (2006.01); B01J 49/00 (2006.01); C01B 15/013 (2006.01); C02F 1/42 (2006.01); C02F 1/44 (2006.01); C02F 1/52 (2006.01)
CPC (source: EP KR US)
C01B 15/013 (2013.01 - EP KR US); C01B 15/0135 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 1167289 A2 20020102; EP 1167289 A3 20031119; EP 1167289 B1 20050810; CN 1172843 C 20041027; CN 1330036 A 20020109; DE 60112514 D1 20050915; DE 60112514 T2 20060413; HK 1041679 A1 20020719; HK 1041679 B 20050401; JP 2002080208 A 20020319; JP 3895540 B2 20070322; KR 100426436 B1 20040413; KR 20010070775 A 20010727; MY 127111 A 20061130; SG 103831 A1 20040526; TW 572845 B 20040121; US 2002012626 A1 20020131; US 6649139 B2 20031118
DOCDB simple family (application)
EP 01303974 A 20010430; CN 01121150 A 20010607; DE 60112514 T 20010430; HK 02103347 A 20020503; JP 2000371996 A 20001206; KR 20010031649 A 20010607; MY PI20011963 A 20010426; SG 200102254 A 20010423; TW 90109622 A 20010423; US 85499601 A 20010514